<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="../js/vue.js"></script>
</head>
<body>
    <!-- 准备好一个容器-->
		<div id="root">
			<h2>人员列表</h2>
			<input type="text" placeholder="请输入名字" v-model="keyWord">
            <button @click="sortType = 2">年龄升序</button>
			<button @click="sortType = 1">年龄降序</button>
			<button @click="sortType = 0">原顺序</button>
            <ul>
				<li v-for="(p,index) of filPerons" :key="p.id">
					{{p.name}}-{{p.age}}-{{p.sex}}
				</li>
			</ul>
		</div>
</body>
<script>
    Vue.config.productionTip = false
    
    // 用computed实现
    new Vue({
        el:'#root',
        data:{
            keyWord:'',
            sortType:0,    // 0原顺序  1降序  2升序
            persons:[
                {id:'001',name:'马冬梅',age:30,sex:'女'},
                {id:'002',name:'周冬雨',age:31,sex:'女'},
                {id:'003',name:'周杰伦',age:18,sex:'男'},
                {id:'004',name:'温兆伦',age:19,sex:'男'}
            ]
        },
        computed:{
            filPerons(){
                const arr = this.persons.filter((p)=>{
                    return p.name.indexOf(this.keyWord) !== -1
                })
                // 判断是否需要排序
                if(this.sortType){
                    arr.sort((p1,p2)=>{
                        return this.sortType === 1 ? p2.age-p1.age : p1.age-p2.age
                    })
                }
                return arr
            }
        }
    }) 
</script>
</html>